【多选题】以下对内分泌系统描述错误的是
A.
内分泌腺如甲状腺,胰岛,肾上腺属于内分泌系统
C.
许多非内分泌组织中有内分泌细胞,可合成和分泌激素,但它们不属于内分泌系统
【简答题】An efficient reader always changes his rate according to his ______ and the difficulty of the reading material.
【单选题】随机原则是指每个研究对象无论是被抽取或分组等,机会都是____的。
【单选题】abridge [E5bridV]
A.
n. 摘要, 大纲 adj. 简短的, 短暂的 vt. 摘要, (军事)下达简令
【单选题】If the error rate of physical link is high, error detection and retransmission is usually more efficient
【单选题】膨胀珍珠岩 可配得密度在 范围的水泥浆。
【单选题】In order to be more productive and efficient, the board decided to ______ a sound system of operation.
【单选题】The efficient rate of emissions occurs when:
A.
there is absolutely no damage done to a pristine environment.
B.
government forbids all pollution no matter what the cost.
C.
the marginal social benefits of pollution exceed the marginal social costs of pollution.
D.
the change in social benefits and the change in social costs due to an additional unit of emissions are equal.
【单选题】阅读U10的“话题导言”及“开口说”部分,完成以下中英文的匹配选择题。 酒店规模
D.
the ground of the hotel